Contour Line Attribution Tool -
This tool is designed to allow the user to draw a line that intersects
one or more unattributed contours. The user then sets the start
elevation (contour) value and the interval at which the elevation
contours should increment.

Iterative Self Select Intersected-
This tool will iteratively loop over selected features (in a single layer) adding to the selected set if those features intersect any other feature.

Tectonic Reconstruct - Tectonic Reconstruct v1.2 (beta) add-in provides a set of tools for the sequential reconstruction of tectonic features.